JP2897316B2 - Reproduction device and headphone device - Google Patents

Reproduction device and headphone device

Info

Publication number
JP2897316B2
JP2897316B2 JP4382790A JP4382790A JP2897316B2 JP 2897316 B2 JP2897316 B2 JP 2897316B2 JP 4382790 A JP4382790 A JP 4382790A JP 4382790 A JP4382790 A JP 4382790A JP 2897316 B2 JP2897316 B2 JP 2897316B2
Authority
JP
Japan
Prior art keywords
headphone
sound
band
audio signal
sound leakage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP4382790A
Other languages
Japanese (ja)
Other versions
JPH03247098A (en
Inventor
亮 山岸
豊 香川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP4382790A priority Critical patent/JP2897316B2/en
Publication of JPH03247098A publication Critical patent/JPH03247098A/en
Application granted granted Critical
Publication of JP2897316B2 publication Critical patent/JP2897316B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は小型テープレコーダ或は携帯用のCDプレーヤ
の如き携帯用再生装置及びこの装置に用いて好適なヘッ
ドフォーン装置に関する。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable reproducing apparatus such as a small tape recorder or a portable CD player, and a headphone apparatus suitable for use in the apparatus.

〔発明の概要〕[Summary of the Invention]

本発明は小型テープレコーダ或は携帯用CDプレーヤ等
の携帯用再生装置及びこの装置に用いて好適なヘッドフ
ォーン装置に関し、音声信号をヘッドフォーンにより聴
く様にした再生装置又はヘッドフォーン装置に於いて、
ヘッドフォーンに供給される音声信号の音漏れ帯域を減
衰する帯域減衰手段を設け、この帯域減衰手段の減衰量
を音声信号のレベルに応じて可変する様にした再生装置
又はヘッドフォーン装置とすることでヘッドフォーンに
よって音楽等を聴いている人以外の周囲の人に音漏れ音
が聞こえない様にすると共に音質の劣化を少くする様に
したものである。
The present invention relates to a portable reproducing apparatus such as a small-sized tape recorder or a portable CD player and a headphone apparatus suitable for use in the apparatus, and in a reproducing apparatus or a headphone apparatus in which an audio signal is listened to by a headphone. ,
A reproducing device or a headphone device in which band attenuation means for attenuating a sound leakage band of an audio signal supplied to a headphone is provided, and the amount of attenuation of the band attenuation means is varied according to the level of the audio signal. The headphone prevents the sound leakage sound from being heard by people other than the person listening to music and the like, and reduces the deterioration of sound quality.

〔従来の技術〕[Conventional technology]

近年、小型の携帯用テープレコーダ或はCDプレーヤ等
からの音声信号をヘッドフォーン或はイヤフォーンによ
って多くの人々の集まる電車の中等で聴き、1人で音楽
を楽しむ人が増えている。この様な携帯用の再生装置或
はヘッドフォーン装置に於いてはその音響出力レベルを
100dB以上にも上げて聞く人もいるためにヘッドフォー
ンを通して聴聞者以外の周囲に音漏れを生じ、社会的に
も種々の問題を投げかけている。
In recent years, people who listen to audio signals from small portable tape recorders or CD players on a train or the like where many people gather by using headphones or earphones, and enjoy music alone. In such a portable reproducing device or headphone device, the sound output level is
Since some people listen at a level of 100 dB or more, sound leaks around the headphone through the headphone, causing various social problems.

この様なヘッドフォーン或はイヤフォーン(本例では
以下イヤフォーンを含めてヘッドフォーンと記す)から
の音漏れを極力小さくする為の従来の構成を以下に説明
する。従来のヘッドフォーンの音漏れ防止構成としては
第7図Aに示す様にコード(12)の一端にテープレコー
ダ本体のジャックに挿入されるプラグ(8)を接続し、
このコードの他端に接続した左右両耳用のヘッドフォー
ン(4)の振動板からの振動音を放音させる放音板を含
むハウジングを覆う様に発泡性合成樹脂(例えばモルト
プレン(商標))等で形成したカバーをかぶせ、ヘッド
フォーン(4)(4)が外耳道入口にフイトして挿入さ
れる様にし、ヘッドフォーン(4)のハウジング外周即
ち、カバーと外耳入口との密閉状態を保持させる様にし
たり、第8図A,Bに示す様にヘッドフォーン(4)
(4)を左右耳(18)(18)に装着する際に耳介(19)
内の外耳道(20)と外耳道入口(21)との位置関係に合
せて、ヘッドフォーン(4)のハウジングの外周部(2
2)と振動板の放音孔(23)位置を同心円状にせず非対
称とし、ハウジングの外周部(22)を柔かいゴム部材等
で形成し、外耳道入口(21)に密閉状態で挿脱出来る様
に構成させていた。
A conventional configuration for minimizing sound leakage from such a headphone or an earphone (hereinafter, referred to as a headphone including the earphone) will be described below. As shown in FIG. 7A, a plug (8) inserted into a jack of a tape recorder main body is connected to one end of a cord (12) as a sound leakage prevention structure of a conventional headphone.
Foamable synthetic resin (for example, maltoprene (trademark)) so as to cover a housing including a sound emitting plate that emits a vibration sound from the diaphragm of the headphone (4) for both right and left ears connected to the other end of the cord. The headphone (4) (4) is fitted over the entrance of the ear canal so that the headphone (4) is inserted into the entrance of the ear canal so that the outer periphery of the housing of the headphone (4), that is, the cover and the entrance of the external ear are kept closed. Headphone (4) as shown in FIGS. 8A and 8B.
When attaching (4) to left and right ears (18) and (18), pinna (19)
According to the positional relationship between the external ear canal (20) and the external ear canal entrance (21), the outer peripheral portion (2
The position of the sound emission hole (23) of the diaphragm and the diaphragm is not concentric but asymmetric, and the outer periphery (22) of the housing is formed of a soft rubber member so that it can be inserted into and removed from the ear canal entrance (21) in a sealed state. Was configured.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

従来例で説明した様に外耳道入口(21)にフイトする
様にヘッドフォーン(4)(4)のハウジング外周部と
外耳道入口(21)の密閉度を高めたものと、密閉度を高
めないヘッドフォーンとの音漏れ特性を測定すると、第
9図及び第10図に示す様になる。即ち、第9図及び第10
図で縦軸は音圧レベル(dB)を横軸は周波数(Hz)を示
すものであり、第9図はヘッドフォーン(4)(4)を
耳(18)(18)に装着し、聴聞者の頭部側面にマイクロ
ホンを置いて音漏れ音を収音した場合の周波数特性曲線
であり、第10図は聴聞者の頭部正面にマイクロホンを置
いて音漏れ音を収音した場合の周波数特性曲線である。
第9図及び第10図において、符号(24)で示す細い曲線
は入力信号0.25Vで密閉度を高めない場合の特性曲線で
あり、符号(25)で示す太い曲線は入力信号0.167Vで第
8図の様に密閉度を高めたヘッドフォーンの場合の特性
曲線である。この両特性曲線から解るように、音漏れ防
止構造を付しても、6〜10dB程度の改善にとどまってい
る。この様な機械的な音漏れ防止機構では、上述の様に
6〜10dB程度の改善にしたならず、特に密閉度を高め様
とする場合の外耳道入口近傍の形状は聴聞者によって個
人差があり、又ヘッドフォーンの掛け方によっても大き
く左右される。又、耳介を完全に緩衝材のロード等で覆
う様な大型のヘッドフォーンによればかなり音漏れは改
善されるが、大型となり携帯に適さない問題があり、更
に外耳道(20)に振動板からの放音孔導入室部を完全に
挿入する様な安価なイヤフォーンでは音質的に満足でき
るものが得られない問題があった。
As described in the prior art, the headphones (4) and (4) are provided with a higher degree of sealing between the housing outer periphery and the outer ear canal inlet (21) so as to fit into the ear canal inlet (21), and a head that does not increase the degree of sealing. When the sound leakage characteristics with the phone are measured, the results are as shown in FIGS. 9 and 10. 9 and 10
In the figure, the vertical axis shows the sound pressure level (dB) and the horizontal axis shows the frequency (Hz). In FIG. 9, the headphones (4) and (4) are attached to the ears (18) and (18) to listen. Fig. 10 is a frequency characteristic curve when sound leakage sound is collected by placing a microphone on the side of the listener's head.Figure 10 shows the frequency when sound leakage sound is collected by placing a microphone in front of the listener's head. It is a characteristic curve.
9 and 10, the thin curves indicated by reference numeral (24) are characteristic curves when the input signal is 0.25V and the degree of sealing is not increased, and the thick curves indicated by reference numeral (25) are input signal 0.167V when the input signal is 0.167V. FIG. 8 is a characteristic curve in the case of a headphone with a high degree of sealing as shown in FIG. As can be seen from these two characteristic curves, the improvement is only about 6 to 10 dB even if the sound leakage prevention structure is provided. With such a mechanical sound leakage prevention mechanism, as described above, the improvement of about 6 to 10 dB has not been achieved, and the shape near the ear canal entrance, particularly when the degree of sealing is to be increased, varies from one listener to another. It also depends greatly on how the headphones are worn. Also, a large headphone that completely covers the pinna with a buffer material can improve sound leakage considerably, but has a problem that it is large and unsuitable for carrying. Inexpensive earphones that completely insert the sound emission hole introduction chamber from the room have a problem that satisfactory sound quality cannot be obtained.

特に音漏れ帯域がフレッチャー・マンソン特性曲線の
2〜5kHz近傍であるため、人間の耳には小レベルでも大
きく聞こえる問題があった。
In particular, since the sound leakage band is around 2 to 5 kHz of the Fletcher-Manson characteristic curve, there is a problem that a human ear can hear a large sound even at a small level.

本発明は叙上の問題点を解決するために成されたもの
で、その目的とするところは音質を損わずに聴聞者の周
囲の人に音漏れがしない様にした再生装置及びヘッドフ
ォーン装置を提供しようとするものである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a reproducing apparatus and a headphone which prevent sound leakage to a person around a listener without impairing sound quality. It is intended to provide a device.

〔課題を解決するための手段〕[Means for solving the problem]

本発明の再生装置及びヘッドフォーン装置はその例が
第1図及び第2図に示されている様に音声信号をヘッド
フォーン(4)により聴く様にした再生装置(10)又は
ヘッドフォーン装置(4)(8)(9)に於いて、ヘッ
ドフォーン(4)に供給される音声信号の音漏れ帯域を
減衰する帯域減衰手段(2)を設け、帯域減衰手段
(2)の減衰量の音声信号のレベルに応じて可変する様
にしたものである。
As shown in FIGS. 1 and 2, the reproducing apparatus and the headphone apparatus of the present invention are such that the audio signal is listened to by the headphone (4) or the reproducing apparatus (10) or the headphone apparatus ( 4) In (8) and (9), a band attenuating means (2) for attenuating a sound leakage band of the audio signal supplied to the headphone (4) is provided, and the sound of the attenuation amount of the band attenuating means (2) is provided. It is variable according to the level of the signal.

〔作用〕[Action]

本発明の再生装置及びヘッドフォーン装置によれば音
漏れ帯域を減衰させたので、音漏れが改善され、且つヘ
ッドフォーンの音量に応じて出力減衰量を可変する様に
することが出来るので通常出力では音質の損われない音
声信号を聴聞することが出来るものが得られる。
According to the reproducing device and the headphone device of the present invention, the sound leakage band is attenuated, so that the sound leakage is improved, and the output attenuation can be varied according to the volume of the headphone. Thus, a sound signal that does not impair the sound quality can be heard.

〔実施例〕〔Example〕

以下、本発明の再生装置及びヘッドフォーン装置につ
いて説明する。
Hereinafter, the reproducing device and the headphone device of the present invention will be described.

第1図で本発明の再生装置及びヘッドフォーン装置の
系統図を説明するに先だち、本例に用いる携帯用小型磁
気記録再生装置を第2図によって説明する。
Before explaining the system diagram of the reproducing apparatus and the headphone apparatus of the present invention in FIG. 1, a portable small-sized magnetic recording / reproducing apparatus used in the present embodiment will be described with reference to FIG.

第2図において、(10)は携帯用小型磁気記録再生装
置の筐体であり、筐体側壁には再生,録音,早送り,巻
戻し用の操作摘み等の操作摘み群(10a)、ボリューム
摘み(10c)並にヘッドフォーンジャック(10b)等が設
けられ、筐体(10)のリッド(10d)を開閉して、テー
プカセットを挿入し、記録又は再生し得る様に構成され
ている。テープカセット再生時にはヘッドフォーン
(4)で再生音を聴聞する。ヘッドフォーン(4)はコ
ード(12)を介してリモコンボックスの一端に接続さ
れ、リモコンボックス(9)に配設した可変抵抗器等の
ボリーム摘み(11)で再生出力音量の調整が行なわれ
る。リモコンボックス(9)の他端はコード(12)に接
続されコード(12)の一端にはプラグ(8)が接続され
ている。プラグ(8)をヘッドフォーンジャック(10
b)に挿入することでヘッドフォーン(4)から音声信
号等が放音される。本例の音漏れを防止するための帯域
減衰手段は携帯用小型磁気記録再生装置筐体(10)のヘ
ッドフォーン駆動アンプ回路中に設けることが出来る
か、筐体(10)内に限らずリモコンボックス(9)内、
又はヘッドフォーン(4)(4)のハウジング内に組み
込む様にしてもよい。この様な帯域減衰手段の一実施例
を第1図で説明する。第1図で入力端子(1)にはテー
プカセットに記録した再生信号を再生ヘッドでピックア
ップした音声信号が入力される。この音声信号は帯域防
止濾波器(以下BEFと記す)(2)に供給される。
In FIG. 2, reference numeral (10) denotes a housing of a portable small-sized magnetic recording / reproducing apparatus. On the side wall of the housing, operation knobs (10a) such as operation knobs for reproduction, recording, fast-forward and rewind, and a volume knob. (10c) A headphone jack (10b) and the like are provided in parallel with each other, and a lid (10d) of the housing (10) is opened and closed, a tape cassette is inserted, and recording or reproduction can be performed. At the time of tape cassette playback, a playback sound is heard through the headphone (4). The headphone (4) is connected to one end of a remote control box via a cord (12), and a reproduction output volume is adjusted by a volume knob (11) such as a variable resistor disposed on the remote control box (9). The other end of the remote control box (9) is connected to a cord (12), and a plug (8) is connected to one end of the cord (12). Plug the plug (8) into the headphone jack (10
By inserting it into b), an audio signal or the like is emitted from the headphone (4). The band attenuating means for preventing sound leakage according to the present embodiment can be provided in the headphone drive amplifier circuit of the housing (10) of the portable small-sized magnetic recording / reproducing apparatus, or is not limited to the housing (10). In the box (9),
Or you may make it incorporate in the housing of headphone (4) (4). One embodiment of such a band attenuation means will be described with reference to FIG. In FIG. 1, an audio signal picked up by a reproduction head from a reproduction signal recorded on a tape cassette is input to an input terminal (1). This audio signal is supplied to a band rejection filter (hereinafter referred to as BEF) (2).

BEF(2)の出力はヘッドフォーン駆動アンプ(3)
で増幅され、ジャック(10b)を介してヘッドフォーン
(4)に供給されて、音声信号はヘッドフォーン(4)
から放音される。本例ではヘッドフォーン駆動アンプ
(3)の出力を検出回路(7)に供給し、可変インピー
ダンス手段のトランジスタ(6)のベースに制御電圧を
供給する様にしている。検出回路(7)は抵抗器R4,R5,
R6とコンデンサC4,C5,C6、並にダイオードCD1,CD2より
成る整流回路と平滑回路より成るもので、検出回路
(7)で駆動アンプ(8)の全周波数帯域を整流してベ
ース抵抗器R7を介してトランジスタ(6)に制御電圧を
供給する様にすることも出来るが、例えば、駆動アンプ
(3)と検出回路(7)間に必要に応じて4000〜5000Hz
に中心周波数を持つ帯域通過濾波器(以下BPFと記す)
(5)を介在させることでBEF(2)てエリミネートす
る高域の再生信号成分のみで可変インピーダンスを制御
する様にしてもよい。この様にすると可変フィルタの制
御をより確実に出来る。
The output of BEF (2) is a headphone drive amplifier (3)
The audio signal is amplified by the headphone (4) via the jack (10b) and supplied to the headphone (4).
Sound is emitted from. In this example, the output of the headphone drive amplifier (3) is supplied to the detection circuit (7), and the control voltage is supplied to the base of the transistor (6) of the variable impedance means. The detection circuit (7) includes resistors R 4 , R 5 ,
R 6 and capacitor C 4, C 5, C 6 , those consisting of a rectifier circuit and a smoothing circuit parallel to consisting of diodes CD 1, CD 2, rectifies the entire frequency band of the driving amplifier (8) in the detection circuit (7) Although it is also possible to as to supply a control voltage to the transistor (6) via a base resistor R 7 and, for example, as necessary during driving amplifier (3) and the detection circuit (7) 4000~5000Hz
Band pass filter with center frequency at the center (hereinafter referred to as BPF)
By interposing (5), the variable impedance may be controlled only by the high-frequency reproduced signal component that is eliminated by BEF (2). This makes it possible to more reliably control the variable filter.

更に、検出回路(7)と駆動アンプ(3)間に外部ス
イッチSWを設けて外部の周囲の騒音に応じてマニアル切
換を行なう様にしてもよい。このスイッチSWは磁気記録
再生装置筐体(10)の側壁等に設けても、或はリモコン
ボックス(9)に配設する様にしてもよい。
Further, an external switch SW may be provided between the detection circuit (7) and the drive amplifier (3) to perform manual switching according to external ambient noise. The switch SW may be provided on a side wall of the magnetic recording / reproducing apparatus housing (10) or the like, or may be provided on the remote control box (9).

上述の検出回路(7)では再生音声信号の整流電圧を
ダイオードCD2で検出出来る0.7Vの閾値電圧以下ではダ
イオードCD2は不動作状態となり、トランジスタ(6)
のベースには制御電圧が供給されないためにトランジス
タ(6)はオープン状態であり入力端子(1)に供給さ
れる音声信号はBEF(2)のCR定数で定められるフィル
ター特性の影響をうけない。即ち、BEF(2)は例え
ば、抵抗器R1,R2,R3とコンデンサC1,C2,C3で構成したCR
フィルタであり入力される再生信号レベルに応じて、帯
域特性を第5図A,Bに示す様に可変させるためにCRフィ
ルタを構成する抵抗器R3とコンデンサC3の共通接続端に
可変インピーダンス手段のトランジスタ(6)のコレク
タを接続し、且つエミッタを接地すると共にベースに制
御電圧を供給して可変インピーダンス手段を制御する。
この様な可変インピーダンス手段によって音質信号レベ
ルに応じて制御すると第5図A,Bに示す様なBEF減衰特性
曲線が得られる。第5図Aに太線で示す曲線(26)〜
(30)はBEF(2)を通さない時の各音圧に対する周波
数特性曲線を示し、BEF(2)を通したときの各音圧に
対する周波数特性曲線は第5図Bの如くなる。即ち、BE
F(2)の中心周波数は3000〜4000Hz程度に選択され、
各レベルでのフィルタの減衰特性曲線は第5図Bの曲線
(26a)〜(30a)の如くなる。
Diode CD 2 is below the threshold voltage of 0.7V to the rectified voltage can be detected by the diode CD 2 of the above-described detecting circuit (7) in the reproduced audio signal becomes inoperative, the transistor (6)
Since the control voltage is not supplied to the base of the transistor (6), the transistor (6) is in an open state, and the audio signal supplied to the input terminal (1) is not affected by the filter characteristic determined by the CR constant of the BEF (2). That, BEF (2), for example, resistors R 1, R 2, R 3 and a capacitor C 1, C 2, CR configured in C 3
According to the playback signal level inputted is a filter, the variable impedance in the band characteristics Figure 5 A, a common connection end of the resistor R 3 and capacitor C 3 constituting the CR filter in order to variably as shown in B The collector of the transistor (6) of the means is connected, the emitter is grounded, and a control voltage is supplied to the base to control the variable impedance means.
When control is performed by such a variable impedance means in accordance with the sound quality signal level, a BEF attenuation characteristic curve as shown in FIGS. 5A and 5B is obtained. Curve (26) shown in bold line in FIG.
(30) shows a frequency characteristic curve for each sound pressure when not passing through the BEF (2), and a frequency characteristic curve for each sound pressure when passing through the BEF (2) is as shown in FIG. 5B. That is, BE
The center frequency of F (2) is selected to be about 3000-4000Hz,
The attenuation characteristic curve of the filter at each level is as shown by curves (26a) to (30a) in FIG. 5B.

入力の音声信号、即ち、ヘッドフォーン(4)に入力
されるパワーが小さくなり、例えば0.628mW程度になる
とトランジスタ(6)は上述した様にオープン状態とな
って、通常の音量以下では第5図Bの曲線(30a)の様
にBEF(2)が動作しないので音質を損うことはない。
又、音漏れが生ずる様な音圧レベルになると耳障りな音
漏れ帯域をカットすることが出来る。
When the input audio signal, that is, the power input to the headphone (4) becomes small, for example, about 0.628 mW, the transistor (6) is opened as described above. Since the BEF (2) does not operate as in the curve B (30a), the sound quality is not impaired.
When the sound pressure level is such that sound leakage occurs, a harsh sound leakage band can be cut.

上述の実施例ではBEF(2)を用いた例を説明した
が、このフィルタは高域の3000以上をカットする高域カ
ットフィルタ(以下HCFと記す)であってもよい。
In the above-described embodiment, the example using the BEF (2) has been described. However, this filter may be a high-frequency cut filter (hereinafter, referred to as HCF) that cuts 3,000 or more high frequencies.

上述の構成による従来及び本例の出力音圧と周波数の
変化特性を第3図A,Bに、更に、従来及び本例の出力音
圧と音漏れ特性を第4図ABに示す。第3図Aの(26a)
〜(30a)は各音圧レベルでのBEF(2)を通さない周波
数特性曲線であり、第3図Bの(26c)〜(30c)は各音
圧レベルでの可変フィルター特性曲線を示している。こ
の様なBEF(2)を通さない場合の各音圧レベルに対し
ヘッドフォーン(4)の頭部側部にマイクロホンを置い
て収音した音漏れ特性は第4図Aの曲線(26d)〜(30
d)であるのに対し、BEF(2)を通した場合の各音圧レ
ベルに対する音漏れ特性は第4図Bの如く耳障りな4000
〜5000Hz近傍の音漏れ帯域を10dB乃至20dB程度カットし
ている。
FIG. 3A and FIG. 3B show the output sound pressure and frequency change characteristics of the conventional and the present example, and FIG. 4AB shows the conventional and present example output sound pressure and sound leakage characteristics. (A) of FIG. 3A
(A) to (30a) are frequency characteristic curves that do not pass BEF (2) at each sound pressure level, and (26c) to (30c) in FIG. 3B show variable filter characteristic curves at each sound pressure level. I have. For each sound pressure level when the BEF (2) does not pass through, the sound leakage characteristics obtained by placing a microphone on the side of the head of the headphone (4) are shown by curves (26d) to (A) in FIG. (30
In contrast to d), the sound leakage characteristic for each sound pressure level when passing through the BEF (2) is unpleasant 4000 as shown in FIG. 4B.
The sound leakage band around 50005000 Hz is cut by about 10 to 20 dB.

本例によればヘッドフォーン(4)の駆動アンプ
(3)の出力によってBEF(2)の減衰量を可変たせた
為に通常の音量では音質を損ずに音楽を聞くことが出来
る。又、大音量時には機械的に密閉を高めたヘッドフォ
ーンに比べて10dB以上の音漏れの改善を図ることが出来
る。
According to this example, since the amount of attenuation of the BEF (2) is varied by the output of the drive amplifier (3) of the headphone (4), it is possible to listen to music at normal volume without deteriorating sound quality. Also, when the volume is large, the sound leakage can be improved by 10 dB or more compared to a headphone that has a mechanically enhanced seal.

上述の実施例ではスイッチSWをマニアル操作で切換え
た場合を説明したが、再生専用のテープレコーダでな
く、例えば録音が出来る様な小型携帯用テープレコーダ
では第6図に示す様にマイクロホンを利用し、マイクロ
ホン(17)からの外部周囲騒音を検出し、その検出出力
をアンプ(13)で増幅した増幅出力と、BEF又はHCF
(2)を通して所定の高帯域をエリミネート又はカット
した音声信号を駆動アンプ(3)で増幅した後の再生音
声入力とを例えば、マイコン等の比較回路(15)に供給
し、外部騒音が所定の再生音声入力に比べて大きいか否
かによってスイッチSWを自動的に「オン」,「オフ」制
御する様にしてもよい。即ち、電車等が走り出して外部
騒音が大きくなった時には音漏れ音も目立たないのでHC
F(2)を作動させない様にし、周囲騒音が小さくなっ
た時にHCF(2)を動かせる様にし、その減衰量を適宜
選択する様にすればよい。又、逆にスイッチSWがマニュ
アル操作機能の時は、周囲に人が居なくて音漏れがあっ
ても他人に迷惑を掛けない場合にはスイッチSWを「オ
フ」させる様にすればよい。
In the above embodiment, the case where the switch SW is switched by a manual operation has been described. However, instead of a tape recorder dedicated to reproduction, for example, a small portable tape recorder capable of recording can use a microphone as shown in FIG. , External ambient noise from the microphone (17), the amplified output of which is amplified by the amplifier (13), and the BEF or HCF
The reproduced audio input after amplifying the audio signal obtained by eliminating or eliminating a predetermined high band through the drive amplifier (3) through (2) is supplied to, for example, a comparison circuit (15) such as a microcomputer so that external noise is reduced to a predetermined value. The switch SW may be automatically controlled to be "on" or "off" depending on whether or not it is larger than the input of the reproduced voice. In other words, when a train or the like starts running and the external noise increases, the sound leakage is inconspicuous.
The F (2) may not be operated, the HCF (2) may be operated when the ambient noise is reduced, and the attenuation may be appropriately selected. On the other hand, when the switch SW has the manual operation function, the switch SW may be turned "off" in a case where there is no person around and the sound leakage does not bother others.

本例の構成では周囲の状態に応じて音漏れ音を制御す
ることが出来る。
In the configuration of the present example, the sound leakage sound can be controlled according to the surrounding state.

尚、本発明は叙上の実施例に限定されることなく、本
発明の要旨を逸脱しない範囲で種々変更し得ることは明
白である。
It should be noted that the present invention is not limited to the above-described embodiments, but can be variously modified without departing from the gist of the present invention.

〔発明の効果〕〔The invention's effect〕

本発明の再生装置及びヘッドフォーン装置によればヘ
ッドフォーンの音漏れが大きい帯域を電気的可変フィル
タで減衰させたので、大音量時には機械的に密閉度を高
めたものに比べて音漏れを大幅に改善することが出来る
だけでなく、通常音量では今迄と変ちない音質で音楽を
楽しむことの出来るものが得られる。
According to the reproducing device and the headphone device of the present invention, the band in which the sound leakage of the headphone is large is attenuated by the electric variable filter. Not only can it be improved, but it is possible to enjoy music with the same sound quality as before at normal volume.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の再生装置及びヘッドフォーン装置の一
実施例を示す系統図、第2図は本発明の再生装置及びヘ
ッドフォーン装置の一実施例を示す構成図、第3図は従
来例と本発明の音圧レベル−周波数特性曲線図、第4図
は従来例と本発明の音圧レベル−音漏れ特性曲線図、第
5図は従来例と本発明のフィルター減衰特性曲線図、第
6図は本発明の再生装置及びヘッドフォーン装置の他の
実施例を示す系統図、第7図及び第8図は従来のヘッド
フォーン装置の音漏れ防止方法を説明するための説明
図、第9図及び第10図は従来の音圧レベル−音漏れ特性
曲線図である。 (2)はBEF又はHCF、(3)はAMP、(4)はヘッドフ
ォーン、(5)はBPF、(6)は可変インピーダンス手
段のトランジスタ、(7)は検出回路である。
FIG. 1 is a system diagram showing one embodiment of a reproducing apparatus and a headphone device of the present invention, FIG. 2 is a configuration diagram showing one embodiment of a reproducing device and a headphone device of the present invention, and FIG. FIG. 4 is a sound pressure level-frequency characteristic curve diagram of the present invention, FIG. 4 is a sound pressure level-sound leakage characteristic curve diagram of the conventional example and the present invention, and FIG. 5 is a filter attenuation characteristic curve diagram of the conventional example and the present invention. FIG. 6 is a system diagram showing another embodiment of the reproducing device and the headphone device of the present invention. FIGS. 7 and 8 are explanatory diagrams for explaining a sound leakage preventing method of the conventional headphone device. FIG. 10 and FIG. 10 are conventional sound pressure level-sound leakage characteristic curves. (2) BEF or HCF, (3) AMP, (4) headphone, (5) BPF, (6) transistor of variable impedance means, (7) detection circuit.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−237507(JP,A) 特開 昭60−19397(JP,A) 特開 平2−280518(JP,A) 実開 昭63−95319(JP,U) 実開 平2−47824(JP,U) 特公 昭49−2601(JP,B1) (58)調査した分野(Int.Cl.6,DB名) H04R 3/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-237507 (JP, A) JP-A-60-19397 (JP, A) JP-A-2-280518 (JP, A) Actually open 95319 (JP, U) JP-A-2-47824 (JP, U) JP49-2601 (JP, B1) (58) Fields investigated (Int. Cl. 6 , DB name) H04R 3/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】音声信号をヘッドフォーンにより聴く様に
した再生装置に於いて、 上記ヘッドフォーンに供給される音声信号の音漏れ帯域
を減衰する帯域減衰手段を設け、 該帯域減衰手段の減衰量を上記音声信号のレベルに応じ
て可変する様にしたことを特徴とする再生装置。
1. A reproducing apparatus in which an audio signal is listened to by a headphone, wherein a band attenuator for attenuating a sound leakage band of the audio signal supplied to the headphone is provided. Is varied according to the level of the audio signal.
【請求項2】音声信号をヘッドフォーンにより聴く様に
したヘッドフォーン装置に於いて、 上記ヘッドフォーンに供給される音声信号の音漏れ帯域
を減衰する帯域減衰手段を設け、 該帯域減衰手段の減衰量を上記音声信号のレベルに応じ
て可変する様にしたことを特徴とするヘッドフォーン装
置。
2. A headphone device in which an audio signal is listened to by a headphone, wherein band attenuation means for attenuating a sound leakage band of the audio signal supplied to the headphone is provided. A headphone device wherein the amount is varied according to the level of the audio signal.
JP4382790A 1990-02-23 1990-02-23 Reproduction device and headphone device Expired - Fee Related JP2897316B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4382790A JP2897316B2 (en) 1990-02-23 1990-02-23 Reproduction device and headphone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4382790A JP2897316B2 (en) 1990-02-23 1990-02-23 Reproduction device and headphone device

Publications (2)

Publication Number Publication Date
JPH03247098A JPH03247098A (en) 1991-11-05
JP2897316B2 true JP2897316B2 (en) 1999-05-31

Family

ID=12674589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4382790A Expired - Fee Related JP2897316B2 (en) 1990-02-23 1990-02-23 Reproduction device and headphone device

Country Status (1)

Country Link
JP (1) JP2897316B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11449302B2 (en) 2018-09-28 2022-09-20 Hewlett-Packard Development Company, L.P. Volume adjustments based on ambient sounds and voices

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2592047Y2 (en) * 1991-02-19 1999-03-17 アイワ株式会社 Audio signal processing circuit
JP3016446B2 (en) * 1991-08-20 2000-03-06 ソニー株式会社 Playback device
JP5396685B2 (en) 2006-12-25 2014-01-22 ソニー株式会社 Audio output device, audio output method, audio output system, and audio output processing program
JP4640461B2 (en) * 2008-07-08 2011-03-02 ソニー株式会社 Volume control device and program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11449302B2 (en) 2018-09-28 2022-09-20 Hewlett-Packard Development Company, L.P. Volume adjustments based on ambient sounds and voices

Also Published As

Publication number Publication date
JPH03247098A (en) 1991-11-05

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